Patents by Inventor Merrill Cohen

Merrill Cohen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Aquarium oxygenator
    Patent number: 4784765
    Abstract: An aquarium oxygenator has a container inverted into the apex of a ceramic cone-shaped ceramic structure which rests on the floor of an aquarium. Hydrogen peroxide solution (15%) in the container is decomposed to form oxygen and water in the presence of a catalyst pellet of finely divided silver admixed with clay. Hydrogen peroxide seeps into the cone, and, in the absence of the catalyst, reacts with organic material in the water of the aquarium to produce oxygen which bubbles through an aperture in the side of the cone-shaped structure into the main body of water in the aquarium.
    Type: Grant
    Filed: May 2, 1986
    Date of Patent: November 15, 1988
    Inventor: Merrill Cohen
  • Growing plants in an aquarium
    Patent number: 4114316
    Abstract: An integral, non-floating, plant-food enriched, growth-supporting and plant-holding solid substrate is provided for rooting and growing aquatic plants submerged in water. The substrate comprises a water-cured hydrophilic-polyurethane-prepolymer foam composition in which plants (submerged in water) are grown.
    Type: Grant
    Filed: November 11, 1977
    Date of Patent: September 19, 1978
    Inventor: Merrill Cohen
  • Plant plug
    Patent number: 4074997
    Abstract: A molded nutrient-containing plant-growth medium secured to a weighted base permits the growth of plants in an aquarium without contaminating water in the aquarium with floating soil.
    Type: Grant
    Filed: June 17, 1976
    Date of Patent: February 21, 1978
    Inventor: Merrill Cohen